The first order of business might be practicing your wai. The wai is the action of pressing the palms together (like mimicking a prayer pose) at chest or nose level and bowing your head slightly. You will encounter this gesture almost immediately upon entering Thailand, possibly even on the flight in. While one isn’t required to do the wai, it is certainly an integral part of Thai culture. It shows respect and can be used as a hello, goodbye, and a thank you. Throughout the country you will see Thai men and women doing this in front of Buddha statues, to signify reverence. In a country with a language barrier for many travelers, a simple gesture like the wai can bridge this gap and show appreciation for their culture.
Thai is the language spoken most often in Thailand; however, you will see English in most businesses as well. Numerous apps, phrasebooks, and downloads are available to help even the most inexperienced traveler learn some basic Thai phrases. Thai people are accustomed to tourists, so do not be afraid to try and speak the language; more often than not they will know what you are trying to say, and will appreciate your effort.